The Purfling for the latest Bergonzi violin - its sort of 1mm/0.1mm/0.1mm - may well be ebony on the blacks.
This is my cello pufling I made up - 0.9/0.4/0.4 - planed down to a 1.16mm approx thickness and 2mm deep.
People wonder what we get up to with such small planes !